[j-nsp] Help on BGP

[Harry Reynolds]

I think your best bet is a LR, to which provider A and the customer that
wants full table from A peers.  Advertise inactive only sends the best
BGP route that is inactive due to a more preferred IGP route; AFAIK it
will not function to send a second best BGP route when another BGP route
is selected as active.

HTHs



> -----Original Message-----
> From: juniper-nsp-bounces at puck.nether.net 
> [mailto:juniper-nsp-bounces at puck.nether.net] On Behalf Of Tommy J
> Sent: Friday, July 07, 2006 10:38 AM
> To: ADAM CALLIS; juniper-nsp at puck.nether.net
> Subject: Re: [j-nsp] Help on BGP
> 
> thanks 
> 
> I think if I do that then I will be sending only partial 
> routes to the customer.  I may be wrong. 
> 
> The task on hand is to get full internet routing table from 
> ISP A bypass the blended forwarding table and give the 
> customer the bgp routes learned from ISP A only. 
> 
> Tommy 
> 
> --- ADAM CALLIS <adam.callis at gmail.com> wrote:
> 
> > One way (there are many I am sure) that this can be 
> achieved is to tag 
> > the routes with a Community when they arrive from your external BGP 
> > Sources
> > 
> > Then, on your downstream peers, you could tell it to only advertise 
> > routes that match that community
> > 
> > 
> > I can think of a few more complex ways to attempt this, but it gets 
> > dirty quickly.
> > 
> > One other note, I am not exactly sure if it will send a 
> route from ISP 
> > B that isn't your preferred route even it it is tagged with 
> the proper 
> > community. The advertise-inactive may solve that, but I am not sure.
> > 
> > 
> > Thanks,
> > Adam Callis
> > JNCIE-M #159
> > 
> > 
> > On 7/7/06, Tommy J <sunman_1970 at yahoo.com> wrote:
> > >
> > > Hello
> > >
> > > I am new to Junipers and I need help over a setup
> > that
> > > I haven't done before. Any help will be more than appericated.
> > >
> > > We are a small ISP running BGP4 on our M10i. We
> > have
> > > two upstreams A and B who are providing us with a
> > full
> > > internet routing table. And in turn we are acting
> > as
> > > Transit to our customers and providing them a
> > blended
> > > internet routing table with routes from both
> > upstreams
> > > (The best path).
> > > Now we are getting a demands from our customers
> > who
> > > wants routes only from one upstream only i.e. non blended 
> internet 
> > > routing table either routes from
> > ISP
> > > A or ISP B. How can I achieve this?
> > > I did little research on this subject and logical routers 
> seem to be 
> > > an option.
> > >
> > > Any help on this will appreciated.
> > >
> > > Thanks
> > >
> > > Tommy
> > >
> > >
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> 
> 
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